- 1546, and it has been
variously known as "black
silver ore" (German Schwarzgultigerz),
brittle silver-
ore (Sprödglanzerz), etc. The name
stephanite was...
-
American and
Eurasian plates were separated. As the rock of the
Ore Mountains was too
brittle to be folded, it
shattered into an
independent fault block which...
-
mineral consisting of
silver sulf****nide, Ag3****3,
known also as ruby blende,
light red
silver, ****nic-
silver blende or ruby
silver ore, and an important...
- KAL-kə-PY-ryte, -koh-) is a
copper iron
sulfide mineral and the most
abundant copper ore mineral. It has the
chemical formula CuFeS2 and
crystallizes in the tetragonal...
-
mineral consisting of
silver sulfantimonite, Ag3SbS3.
Known also as dark red
silver ore, ruby blende,
garnete blende or ruby
silver, it is an important...
-
Hematite is not only
harder than pure iron, but also much more
brittle. The term
kidney ore may be
broadly used to
describe botryoidal, mammillary, or reniform...
- Bornite, also
known as pea****
ore, is a
sulfide mineral with
chemical composition Cu5FeS4 that
crystallizes in the
orthorhombic system (pseudo-cubic)...
- of lead(II)
sulfide (PbS). It is the most
important ore of lead and an
important source of
silver.
Galena is one of the most
abundant and
widely distributed...
- from
sphalerite (the
primary ore of zinc),
though germanium is also
recovered commercially from
silver, lead, and
copper ores.
Elemental germanium is used...
- chromium, manganese, gallium, and bi****h—are
brittle. ****nic and antimony, if
admitted as metals, are
brittle. Low
values of the
ratio of bulk
elastic modulus...
